An analog signal having frequency as 8.40 KHz is digitized and stored in a file. If the total time of the signal is 24 min and the file size is 1,92 Mbit, which answer is correct? O a. Bit = 7 bits Data Rate = 72,8 Kbps O b. Bit = 6 bits Data Rate = 50,4 Kbps O c. Bit = 7 bits Data Rate = 117,6 Kbps O d. Bit = 8 bits Data Rate = 47,9 Kbps O e. Bit = 3 bits Data Rate = 50,4 Kbps